#!/usr/bin/env python3
# -*- coding=utf-8 -*-
# 题目：回答结果（结构体变量传递）。


def f1():
    class student:
        x = 0
        c = 0

    def f(stu):
        stu.x = 20
        stu.c = "c"

    a = student()
    a.x = 3
    a.c = "a"
    f(a)
    print(a.x, a.c)


f = f1
if __name__ == "__main__":
    f()
